Lock for elevator-gates.



W. A. WILLIAMS. LOCK FOR ELEVATOR GATES.

2 SHEETS-SHEET I.

Patented Apr. 4, 1916.

m n c o D H N 0 m 2 W m P A 0 000 H0 O J O z 6 19 l .w 8 7 n a 3 lINVENTOH WITNESSES- ":u: coLumum PLANOGRAPH .Ccu. WASHINGTON, D. C.

v w, A. WILLIAMS.

LOCK FOR ELEVATOR GATES. APPLICATIONYFILED ocT.2i. I9l5.

1 ,178, 1 98., Patented Apr. 4, 1916.

2 SHEETS-SHEET 2- INVENTOR ATTORNEYS WITNESSES so a tion, arrangement ofparts and combinations of elements which will hereinafter be fully Toall whom it may concern:

WILLIAM A. WILLIA S, F BARTON, OHIO.

Specification of Letters Patent.-

LO C K FOR ELEVATOR-GATES.

Patented Apr. 4, 1916.-

Application filed October a7, 1915. Serial no]. 58,249.

Be i known that I, WILLIAM A. WIL- LIAMS, a citizen of the United Statesof America, and resident of Barton, county of Belmont, and State ofOhio, have invented certain newj and useful Improvements in Locks forElevator-Gates, of whichthe following is a specification. v j I Thisinvention relates broadly to; locks for elevator gates, and moreparticularly to a locking mechanism for the gates at the l of the shaft.

mouth of mine-shafts and the like; and it has for its primary object toprovide mechanism whereby such gates are maintained locked until thecage has assumed its proper loading and unloading position at the mouthA further object is to provideajdevice of the character mentioned whichis simple,

durablev and comparatively inexpensive in its construction and whichshall passes,

numerous advantages over the locks com monly employed. And a furtherobject is to provide, in connection with the gate locking mechanism,means for indicating at a distant point, as the. engine item] from whichthe elevator is controlled,the position occupied by the gate. 1

V Vith these and other objects in view, the invention resides in thefeatures of construcdescribed, reference being had to the "accompanyingdrawings, forming a part of this specification, in which' Figure 1 is afront elevation of an elevator i gate and elevator cage, to which theparts composing the invention are applied; Fig. 2] is a side view of aportion of the bottom ofthe cage and an adjacent portion of the sframework at the mouth of a shaft, showing partsof the invention appliedthereto; Fig; 3 isan enlarged detail elevation of said parts; Fig. 4 isa bottom plan view of the same; and Fig. 5 is, a section on line 5+5,Fig. 3.

Referring to said drawings, in which like I designatingcharactersdistinguish like parts .1 and exit from said cage being hadthrough throughout the several views--1 indicates generally a shaftelevator or cage and 2 the gate at the mouth of the shaft, entrance tosaid gate. Mounted at a suitable point, as upon thetop of a member 3 ofthe frame provided about the mouth of the shaft is the horizontalportion 4 of an angular plate 4 while a vertical portion 4. ofs'aidplaterests against the inner face of said member 3, as is most clearly shownin Fig. 3. Bigidly mounted upon said plate adjacent to the angle thereofis a hinge member 5 to which is hinged or pivoted the upper end of' anarcuately curved inwardly facing abutment or cam 6 to the lower end ofwhich is pivotedthe lower end of a lever 7. Said lever inclines upwardand outward to the rear of the vertical portion 4" of plate 4: and ispivotally mounted at a point intermediate its ends upon rearwardlydirected lugs 8 carried on the rear face of said portion l The upper endofsaid lever is pivotally connected to the inner end of a horizontallymovable slide 9 which operates maintaining the slide 9 in an outwardly,or

rearwardly, thrust position.

Provided in the horizontal portion 4 of plate 41 and in the slide 9,respectively, are apertures 13 and 14 which normally occupy positionsout of register, but which are brought into register when the slide 9 isdrawn outward under pressure applied to the cam 6. Said apertures aredesigned to receive therein the lower end of a vertically disposed dog15 having a notch 16 in which a portion of the slide 9 seats when thelatter occupies its normal rearwardly thrust position, said dog beingthus locked against upward movement and, consequently, prevent ingelevation of a latch-bar 16 to which it is attached at its upper end.Said latch-bar has one end pivotally mounted upon the gate 2 and seatsadjacent to' its outer end in an open keeper 17 which is fixedupon a stationary post 18 located adjacent to the end of the gate. Thus, as isapparent, the gate is normally maintained locked and may be opened onlywhen the slide 9 is drawn to a position wherein its aperture 14registers with the aperture 13 in plate 4, in which 130- sition thelatch-bar 16 and suspended dog 15 may be freely raised by hand power applied to the outer end of said bar.

To provide for automatically freeing the rod to permit the opening ofthe gate when the cage assumes a proper position at the mouth of theshaft, a suitablebumper mechanism is provided. Said mechanism may be ofany type suitable for engaging,

y sill 20. Horizontally slidable on the face of said plate is aslide-member 21 which has journaled in its outer end a roller 22, saidmember being heldin position by keepers 23 carried by said plate. Theinner end of said slide-member is pivotally connected to a lever 24: ata point intermediate the ends of, the latter. Said lever has its lowerend pivotally mounted on said plate 19 and when occupying its rearmostposition maintains said roller 22 withdrawn from operative relation tothe cam 6. When occupying its forward position, however, said leverholds said roller in a position wherein it will engage and thrust thecam 6 back for releasing the dog. In practice, the roller occupies itsoutwardly. thrust position so that when the cage has risen to its properposition at the surface, the gate is thereby caused, through theintermediate mechanism, to be unlocked.

Any appropriate means may be employed for indicating at a distant point,as in the engine room from which the movements of the cage arecontrolled, the closed and open positions of the gate. An example ofsuch means comprises a dial indicator 25 located in the engine room,said indicator being disposed in a battery circuit the oppositeterminals of which are respectively connected to contact pieces 26 and27 carried by the latch-bar 16 and the keeper 17 at points where theywill engage for closing the circuit when said bar is received by saidkeeper.

What is claimed is 1. The combination with an elevator and a gateguarding the entrance to an elevator shaft, of a latch-bar carried bysaid gate, a keeper disposed in fixed position and adapted for receivingan end of said bar when the gate is closed, a dog carried by said bar,means mounted adjacent to the mouth of the shaft and interlocking withsaid dog when the bar is received in said keeper for normally preventingdisengagement of said bar from said keeper, and means carried by theelevator for releasing said dog when the elevator assumes apredetermined position.

2. The combination with an elevator and a gate guarding the entrance toan elevator shaft, of a latch-bar carried by said gate, a keeperdisposed in fixed position and adapted for receiving an end of said barwhen the shaft, of a latch-bar carried by said gate, a

keeper disposed in fixed position and adapted for receiving an end ofsaid bar when the gate is closed, a dog carried by said bar,

spring-held means located adjacent tothe' mouth of the shaft for lockingsaid dog against movement to prevent removal of said bar from saidkeeper, and means carried by said elevator whereby,when the lat terassumes a predetermined position, said locking means is renderedinoperative.

4. The combination with an elevator and a gate guarding the entrance toan elevator shaft, of a latch-bar carried by said gate, a keeperdisposed in fixed position and adapt ed for receiving an end of said barwhen the gate is closed, a dog depending from said bar, a horizontallymovable latch, means for normally holding said latch in a position forinterlocking with said dog, and means carried by the elevator foreifecting the withdrawal of saidlatch frominterlocking relation'withsaid dog' when the elevator assumes a predetermined position. I H j 5.The combination with an elevator-and agate guarding the entrance to anelevator shaft, of a vertically movable latch-bar having a depending dogprovided with a notch therein, and means for interlocking with said dogfor preventing vertical movement of the latter; said means comprising ahorizontal plate mounted in fixed position at'the mouth of said shaft,an arcuately curved member hinged at its upper end to said plate, alever having its lower end pivotally connected to the lower end of saidcurved member and being pivotally mounted in-f termediate it's ends to afixed point reargate is closed, a dog carried by said bar,

ward of said curved member, a horizon tally movable latch having one end"piv otally connected to the upper end of said lever, said plate andsaid latch having apertures therein which are adapted to register in oneposition of said latch and which are designed to receive the lower endofsaid dog, and a spring disposed to exert pressure against said curvedmember for thrusting said latch to a position wherein said aperturesare'out of register and the latch engages the notch in said dog; andmeans carried by the elevator whereby,'when the latter assumes apredetermined position, said curved member is forcedibackagainstthetension of said spring for withdrawing said latch to release said dog.

6. In a device of the character described, the combination with a gatelatch having a depending dog, of means for interlocking with said dog toprevent raising of saidv latch, said means comprising a stationary plateapertured to receive said dog, an arcuately curved abutment having itsupper end pivotally connected to said plate, a lever pivotedintermediate its ends at a point rearward of said abutment, said leverhaving its lower end pivotally connected to said. abutment, a latchpivotally connected to the upper end of said lever and slidableunderneath said plate, the last mentioned latch having an aperturedesigned in the retracted position of the latch to register with theaperture in said plate, and a spring disposed to maintain said slidablelatch in a rearwardly thrust" position interlocking with said dog, saidslidable latch being adapted to be retracted by rearwardly directedpressure applied to said abutment.

In testimony whereof, I afiix my signature in presence of twosubscribing witnesses.

WILLIAM A. WILLIAMS. Witnesses:

R. M. SIMPSON, E. W. HARRIS.

Copies of this patent may be obtained to lfive cents each, by addressingthe "commissioner of Patents, Washington, D. G.

